[Concept] Roundness 2d

computation of distance from shape tops to considered circle

This measure is based on LeastSquareCircle2d measure results.

It computes, given a shape and associated circle 2d approximation, signed distance to estimated circle from each top of shape :

Estimated circle can be computed using a simple parametric estimation of shape tops or can be computed using a robust estimation technic. This behavior is ruled by measure parameter, see ipsdk::imaproc::attr::RobustEstimationConfig.

For more information on circle 2d estimation please refer to LeastSquareCircle2d.

See also: https://en.wikipedia.org/wiki/Roundness_(object); A guide to the Measurement of Roundness. Taylor-Hobson Precision. Diameter is not the same as roundness; The calibration of a roundness standard, Reeve, C. P., Final Report National Bureau of Standards, Washington, DC., 06/1979.